bindings: Make the sequence conversion code more complaint with WebIDL.

third_party/WebKit/Source/bindings/core/v8/ExceptionMessages.cpp

Index: third_party/WebKit/Source/bindings/core/v8/ExceptionMessages.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/ExceptionMessages.cpp b/third_party/WebKit/Source/bindings/core/v8/ExceptionMessages.cpp
index c145537a7b1e30b20f13387463fd20a9ccde5cd6..4a02e87c720b3c3ead34f757c3debddfc6cb9826 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ExceptionMessages.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/ExceptionMessages.cpp
@@ -118,16 +118,6 @@ String ExceptionMessages::ArgumentNullOrIncorrectType(
          " object.";
 }
 
-String ExceptionMessages::NotAnArrayTypeArgumentOrValue(int argument_index) {
-  String kind;
-  if (argument_index)  // method argument
-    kind = OrdinalNumber(argument_index) + " argument";
-  else  // value, e.g. attribute setter
-    kind = "value provided";
-  return "The " + kind +
-         " is neither an array, nor does it have indexed properties.";
-}
-
 String ExceptionMessages::NotASequenceTypeProperty(
     const String& property_name) {
   return "'" + property_name +